Compressor for ammonia systems.



APPLICATION FILED APR. 3, 1912.

Patented Dec. 8, 1914.

JOHN L. VIDAR, OF LOS ANGELES, CALIFORNIA.

COMPRESSOR FOR AMMONIA SYSTEMS.

Specification of Letters Patent.

Patented Dec. 8, 1914.

Application filed April 3, 1912. Serial No. 688,305.

To all whom it may concern Be it known that 1, JOHN, L. VIDAR, a citizen of the United States, residing at Los Angeles, in the county of Los Angeles and State of California, have invented new and useful Improvements in Compressors for Ammonia Systems, of which the following is a specification.

This invention relates to improvements in compressors and particularly to that class of compressors that are adapted for use in ammonia cooling systems. i

It is an object of the invention to pro vide a compressor for anhydrous or other ammonia, or fluids of any kind in which the valves employed will seat perfectly at all times for preventing the return of the material after it is compressed, the valves being mounted in a casing having no portions constructed so as to facilitate leakage.

It is also an object of the invention to provide a fluid compressor having a casing provided with removable valve seats formed with depressed seats and having spring actuated balls adapted to engage the same.

It is also an object of the invention to provide a fluid compressor especially adapted for the compressing of ammonia in which inner and outer casings are provided, and in which valve mechanisms are located in the walls between the casing, facilitating the handling of ammonia without the danger of leakage.

It is a still further object of the invention to provide a compressor formed with a water jacketed cylinder and having bores extending into the same to receive valve mechanisms, and to provide removable valve seats which may be positioned in said bores, ball valves being employed in connection therewith.

In the accompanying drawing forming a part of this specification, Figure 1 is a cen-.

tral longitudinal sectional view taken through the improved compressor. Fig. 2 is a transverse sectional view taken upon the line 22 of Fig. 1. Fig. 3 is a transverse sectional view taken upon the line 3-3 of Fig. 1. Fig. 4: is an enlarged detail sectional View through one of the valve seats removed from the casing of the compressor.

The details and features of the invention will now be more particularly described, reference being had to the said drawing in which 5 indicates an inner casing forming a cylinder in which is movably mounted a compressor piston 6. The piston is provided with a piston rod 7, adapted to extend to any suitable mechanism, whereby it may be reciprocated for pumping and compressing ammonia or other fluids. Outside the casing 5 is an outer casing 8 having a suflicient space left between it and the said casing 5, to form a water jacket of proper size. The end of said casing 8 is adapted to be opened, being provided with a removable eap plate 9, which is secured in position by bolts 10. The head of the cylinder 5 is preferably made quite thick and is connected by portions 11 and 12 with the walls of the outer casing 8. The said head and the connections referred to, afford material in which recesses may be formed to receive suitable valve mechanisms. The said head is provided with a bore 13 extending into the same, parallel with the piston rod 7, and the said bore is made to pass entirely through the head of the cylinder, the inner end thereof being somewhat reduced in diameter and threaded at 1%, to receive a removable valve seat 15. The outer end of the said'bore is also screw threaded and adapted to receive a plug 16. A. ball valve 17 is mounted in the passage 13 and a spring 18 interposed between the same and the plug 16, normally tending to hold the valve to its seat. Entering the valve passage 13 from the side is a bore 19 formed in the connecting portion .12 of the casing. An outlet pipe 20 is fitted into the end of said bore 19 and leads the compressed ammonia to any desired point. The casing portion 11 is also provided with a passage 21 similar to the passage 13 and bored into the material from the end of the casing. Theinner end of said passage is provided with a reduced screw threaded portion 22 in which a valve seat 23 is mounted, and screw plug 24. closes the outer end of said passage 21. A ball valve 25 is mounted in the passage 21 and a spring 26 normally holds it to its seat. An angular bored passage 27 is also formed in the end of the cylinder leading from the passage 21 into the interior of the cylinder 5. It will thus be seen that both passages which enter the cylinder 5, enter through the end wall thereof so that the piston may travel approximately the full length of the cylinder in its operation. A passage 28 is formed in the portion 11 of the casing and communicates with the passage 21, the outer V ceive the ball valves.

end of said passage having an inlet .pipe 29 fitted therein. provided with an inlet pipe 30 and an outlet pipe 31 to facilitate the proper circulation of cooling water through the saidv jacket. I r

Both of the valve seats and 23 are preferably made as illustrated in Fig. 4 in especially well adapted for the pumping anc compressing of ammonia in cooling sys-.

terns, the movement of the piston away from the head ofthefcyl nders operating to draw in ammonia past the valve 25, the valve 15 being seated for preventing a return in of ammonia previously pumped into the outlet pipe. The return stroke of the piston forces the ammonia drawn into the cylinder past the valve 15 and to any desired point n the system, the valve 25 being seated during the time. I v

Heretofore valves employed in compressingdevices, and particularly ammonia compressors, have shown a tendency to become readily clogged so that theydo not work well, especially when foreign materials or flakes lodge between the valves and their seats. This trouble is obviated and entirely prevented in the present device by the employment of the peculiarly formed valve seats described and thespring pressed balls.

The continual moving of the balls back and forth against the seats is found to more or Copies of this patentmay be obtained for The water jacket space is lesscause the rotation. thereof under the action of the springs, so that foring' the valves and the parts wear a .great I length of time. It will be observed also that all the moving parts are so mounted-within the casing, that there is practically no chance for leakage of the ammonia or other material being compressed, at any point.

VVhat I claim is:

In a compressor, a cylinder, an outer casing surrounding the cylinder, a head closing one end of the cylinder and connecting with the inner walls of'the outerv casing, said cylinder casing and head being formed integral, said head formed with a pair of bores therethrough, one bore leading to one side of the cylinder and connecting at its end with an inlet opening in the outer casingand communicating at 'itsends with'the interior of the cylinder, the other bore communicating at its inner end with the interior of the cylinder and connecting inter mediate its ends with the outlet opening in the outer casing, said boresreduced in di-' ameter at their inner ends, valve seats threaded in the reduced inner ends of the bores, ball valves mounted on said seats within the bores, plugs threaded in the outer ends of the bores closing same, and springs interposed between the plugs and ball valves.

I In witness that I claim the foregoing I day of March, 1912. p I

- JoH L. vmAiR:

have hereunto subscribed my name this26th l Vitnesses ED ND A. S'rRAtrsE, EARLE R. PoLLARD.

five cents each, by addressing the 'comini ssi oner of Patents.

Washington, I). G. 

